The Ollo SDK follows one simple flow:

Everything runs locally and requires no calibration.
Create a developer account: Grants access to builds for Unity, Unreal, Godot and native C++.
Download the SDK for your engine: Once you sign up, you'll get direct engine-specific download links in your dashboard. Each build includes headers, binaries and a tiny example scene.
Sign in from your editor: Press Sign in in Ollo's panel, check that your browser shows the same code, and approve it. There is no license file to copy, and your first sign-in starts a 14-day trial. See SDK Activation.
All processing runs locally with minimal runtime overhead. Designed to fit naturally into real-time gameplay systems.